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PDF BAL-2690D3U Data sheet ( Hoja de datos )
| Número de pieza | BAL-2690D3U | |
| Descripción | EMI Filtering And Signal Conditioning | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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BAL-2690D3U
50 / 30+j25 balun transformer for 2.45 GHz ISM band
Features
■ 50 Ω nominal input / 30+j25 output differential
impedance
■ Low insertion loss
■ Low amplitude imbalance
■ Low phase imbalance
■ Small footprint: BAL-2690D3U < 1 mm²
Benefits
■ Very low profile (<700 µm)
■ High RF performances
■ RF BOM and area reduction
Applications
Balun transformer for applications such as:
■ Bluetooth STLC2690
■ Mobile phone
Description
The BAL-2690D3U is a balun designed to
www.DataStrhaenets4fUo.rcmomsingle ended signals to differential
signals in Bluetooth applications.
The BAL-2690D3U has been customized for the
STLC2690 Bluetooth transceiver with 0.8 dB
insertion losses in the bandwidth
(2400 MHz - 2500 MHz) and with a specific
requirement for the SCC22 parameter.
The BAL-2690D3U has been designed using
STMicroelectronics IPD (integrated passive
device) technology on non conductive glass
substrate to optimize RF performances.
Flip Chip
4 bumps
Figure 1. Top view
Top View
GND AA2
SE BB22
AA11 BAL -
ZZCC
BB11 BAL +
Bump Name Description
A1 BAL- RF balanced ouput
A2 GND Ground
B1 BAL+ RF balanced ouput
B2 SE RF input
Figure 2. Application schematic
2.4G
Antenna
Band
Pass
Filter
WLAN
PA
+ SP3T
BT
Balun
BT
RFIC
January 2010
TM: IPAD is a trademark of STMicroelectronics.
Doc ID 16056 Rev 1
1/8
www.st.com
8
1 page  
BAL-2690D3U
2 Package information
Package information
● Epoxy meets UL94, V0
● Lead-free package
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Table 4.
Ref.
A
A1
A2
b
D
D1
E
E1
SE
$
Package dimensions (values)
Dimensions
Millimetres
Min.
0.565
0.17
-
0.215
0.86
-
0.86
-
-
-
Typ.
0.63
0.205
0.4
0.255
0.91
0.474
0.91
0.474
0.237
0.025
Max.
0.695
0.24
-
0.295
0.96
-
0.96
-
-
-
Min.
0.022
0.007
-
0.008
0.034
-
0.034
-
-
-
Inches
Typ.
0.025
0.008
0.016
0.010
0.036
0.019
0.036
0.019
0.009
0.001
Max.
0.027
0.009
-
0.012
0.038
-
0.038
-
-
-
Figure 11. Package dimensions (definitions)
www.DataSheet4U.com
b
A2 A1
ZC
B2 B1
D
$
D1
Doc ID 16056 Rev 1
5/8
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